GOSE忍道修炼: curved channel with adjustable end chamber

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Weight is 681g, overall length 16.5cm and curved internal length 12.5cm, approximately 14cm when fully straightened. The reverse-C torso has a raised abdomen and detailed back folds. The material is rated -1 on the review's own scale, with good softness and elasticity but some oil release requiring appropriate powder care. This is not standardized hardness. The integrated entrance resembles 圣洁之宫; material seams can peel.

The channel follows the body curve, with a middle rise and complex folds before the end chamber, providing mild friction. Some 火炮 fold designs are similar but firmer. The wide cavity needs air expulsion, and its many small features require careful drying after washing. Matching exterior and interior angles avoids obvious wall bulging in the review; the advertised raised-abdomen effect was not clearly experienced.

Hand pressure over the end chamber changes feedback, while reversing grip orientation changes contact with the structures. Overall intensity is low to moderate, with well-controlled shape and thickness. Oil release and entrance seams remain limitations. The original recommendation is 5 stars.